Derivative Financial Instruments - Derivatives Effect on Statements of Income (Detail) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	$ (3,053)	$ 8,200	$ (3,196)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	(1,717)	9,057	(1,176)
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	(9,422)	(2,695)	29,201
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	4,413	713	3,587
Derivatives Not Designated as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	3,136	(846)	1,182
Lead forward contracts \| Designated as Hedging Instrument \| Cost of goods sold
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	(3,703)	(455)	(3,883)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	(4,880)	5,388	(3,765)
Foreign currency forward contracts \| Designated as Hedging Instrument \| Cost of goods sold
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	1,475	1,740	1,849
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	1,297	612	2,589
Foreign currency forward contracts \| Derivatives Not Designated as Hedging Instruments \| Other (income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	3,136	(846)	1,182
Cross currency fixed interest rate swaps \| Designated as Hedging Instrument \| Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	(9,422)	(2,695)	29,201
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	4,413	713	3,587
Interest rate swaps \| Designated as Hedging Instrument \| Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	(825)	6,915	(1,162)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	$ 1,866	$ 3,057	$ 0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4E
-Publisher FASB
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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-11

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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